package com.lopo.repeat_submit;

import com.lopo.util.JackSonUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 判断请求url和数据是否和上一次相同，
 * 如果和上次相同，则是重复提交表单。 有效时间为10秒内。
 *
 * @author ruoyi
 */
@Component
public class SameUrlDataInterceptor extends RepeatSubmitInterceptor {
    @Autowired
    private RedisTemplate redisTemplate;

    public final String REPEAT_PARAMS = "repeatParams";

    public final String REPEAT_TIME = "repeatTime";

    public final String SESSION_REPEAT_KEY = "repeatData";

    @SuppressWarnings("unchecked")
    @Override
    public boolean isRepeatSubmit(HttpServletRequest request, RepeatSubmit annotation) throws Exception {
        // 本次参数及系统时间
        String nowParams = JackSonUtils.toJson(request.getParameterMap());
//        Map<String, Object> nowDataMap = new HashMap<String, Object>();
//        nowDataMap.put(REPEAT_PARAMS, nowParams);
//        nowDataMap.put(REPEAT_TIME, System.currentTimeMillis());

        // 请求地址（作为存放session的key值）
        String url = request.getRequestURI();

        final String s = (String) redisTemplate.opsForValue().get(url);

        if (StringUtils.isNotBlank(s)) {
            if (s.equals(nowParams)) {
                return true;
            }
        }

        redisTemplate.opsForValue().set(url, nowParams, annotation.interval(), TimeUnit.MILLISECONDS);

//        HttpSession session = request.getSession();
//        Object sessionObj = session.getAttribute(SESSION_REPEAT_KEY);
//        if (sessionObj != null) {
//            Map<String, Object> sessionMap = (Map<String, Object>) sessionObj;
//            if (sessionMap.containsKey(url)) {
//                Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
//                if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap, annotation.interval())) {
//                    return true;
//                }
//            }
//        }
//        Map<String, Object> sessionMap = new HashMap<String, Object>();
//        sessionMap.put(url, nowDataMap);
//        session.setAttribute(SESSION_REPEAT_KEY, sessionMap);
        return false;
    }

    /**
     * 判断参数是否相同
     */
    private boolean compareParams(Map<String, Object> nowMap, Map<String, Object> preMap) {
        String nowParams = (String) nowMap.get(REPEAT_PARAMS);
        String preParams = (String) preMap.get(REPEAT_PARAMS);
        return nowParams.equals(preParams);
    }

    /**
     * 判断两次间隔时间
     */
    private boolean compareTime(Map<String, Object> nowMap, Map<String, Object> preMap, int interval) {
        long time1 = (Long) nowMap.get(REPEAT_TIME);
        long time2 = (Long) preMap.get(REPEAT_TIME);
        if ((time1 - time2) < interval) {
            return true;
        }
        return false;
    }
}
